Support missing images folder.

platforms/hubspot/hubspot-email-adapter.js

@@ -26,6 +26,10 @@ export async function createDistFolder(blockName, projectPath = '') {
 }
 
 export function getBlockFields(block = {}, type = 'content') {
+  if (!block['field_groups']) {
+    return [];
+  }
+
   const fields_group = block['field_groups'].find((group) => group.name === type);
   const fields = [];